CN112813846A - Self-balancing thrust-free dragging pushing system - Google Patents
Self-balancing thrust-free dragging pushing system Download PDFInfo
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- CN112813846A CN112813846A CN202110178200.6A CN202110178200A CN112813846A CN 112813846 A CN112813846 A CN 112813846A CN 202110178200 A CN202110178200 A CN 202110178200A CN 112813846 A CN112813846 A CN 112813846A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to a self-balancing push-free dragging and pushing system which comprises a plurality of vertical temporary supports, wherein the vertical temporary supports are fixedly connected with each other through self-balancing horizontal inner supports to form a whole, a pier top supporting sliding device is arranged at the top of each vertical temporary support and used for supporting a moved structure, the top surface of each pier top supporting sliding device is a moving surface in contact with the moved structure, a dragging and pushing device is arranged at the top of one vertical temporary support in front of the moved structure in the moving direction and fixedly connected with the moved structure through a horizontal cable, and the dragging and pushing device exerts pulling force on the moved structure through the horizontal cable. The invention has the advantages that: the temporary engineering quantity is greatly reduced, and the working efficiency is improved; the small-step continuous pushing operation is realized, and the pushing speed can be greatly improved; the structure is ensured to be safe, stable and continuous, and the method has good innovation and application value.
Description
Technical Field
The invention relates to the technical field of underground engineering, in particular to a self-balancing non-thrust dragging and pushing system.
Background
The top pushing method construction has been rapidly developed in the world bridge construction history since the successful application of the top pushing method construction in the Austrian Ager bridge in 1959, and China also adopts the top pushing method to construct the Dijia river bridge for the first time in 1977.
The dragging type multipoint continuous pushing method is a traditional construction process (hereinafter referred to as dragging method) which is commonly used in pushing construction at home and abroad at present, and the principle is as follows: the steel strand at the bottom of the connecting beam is dragged by a hydraulic jack arranged on each pier (temporary pier) so as to drive the beam section to move forwards on a slide way arranged at the top of the temporary pier. The dragging pushing system mainly comprises a slideway system, a traction system and a limiting and correcting system. The slideway system mainly comprises a slideway beam, a pad beam and a distribution beam; the traction system consists of a jack, a steel strand and an anchor puller; the deviation correcting device adopts a center-penetrating jack, and the transverse position of the steel box girder is adjusted through tensioning and traction.
Although the dragging method has the characteristics of high speed, simple and convenient construction and the like, a strong temporary backrest needs to be manufactured before dragging construction so as to provide dragging horizontal force. Along with the increase of the tonnage of dragging, the volume of the temporary backrest is not small, and after the construction is finished, the effect disappears, and the temporary backrest needs to be dismantled, so that a large amount of temporary engineering is caused, and the construction cost is influenced.
Disclosure of Invention
The invention aims to provide a self-balancing push system without thrust, which can reduce a temporary backrest structure through self-balancing of internal force of the system, greatly improve the pushing efficiency and reduce the manufacturing cost on the premise of ensuring the structural stability and safety.
The purpose of the invention is realized by the following technical scheme:
a self-balancing thrust-free dragging and pushing system is used for dragging and pushing a moved structure and is characterized in that: including a plurality of vertical temporary supports, prop fixed connection through self-balancing level in between the vertical temporary support and constitute wholly the top of vertical temporary support is provided with mound top support sliding equipment, mound top support sliding equipment is used for supporting by the moving structure thing just the top surface of mound top support sliding equipment be with by the removal face of moving structure thing contact by one in moving structure thing moving direction the place ahead the top of vertical temporary support is provided with dilatory thrustor, dilatory thrustor pass through the horizontal cable with by moving structure thing fixed connection, dilatory thrustor passes through the horizontal cable is right it exerts the pulling force to be moved the structure thing.
A guide device is provided at the leading end of the structure to be moved along the moving direction of the structure to be moved.
The bottom surface of the guide device is arranged obliquely upwards.
And a rear anchor is arranged at the bottom of the moved structure and behind the moved structure along the moving direction of the moved structure, one end of the horizontal cable is fixedly connected with the rear anchor, and the other end of the horizontal cable is fixedly connected with the dragging and pushing equipment.
The vertical temporary supports are arranged at regular intervals along the moving direction of the moved structure.
The self-balancing horizontal inner support is arranged at the top of the vertical temporary support and is lower than the mounting platform of the dragging pushing equipment.
The vertical temporary support comprises upright posts and supports arranged between the upright posts.
The invention has the advantages that: the temporary engineering quantity is greatly reduced, and the working efficiency is improved; the small-step continuous pushing operation is realized, and the pushing speed can be greatly improved; the structure is ensured to be safe, stable and continuous, and the method has good innovation and application value.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the principle of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-2, the labels 1-8 in the figures are respectively expressed as: the device comprises a moved structure 1, a guide device 2, a rear anchor 3, a horizontal cable 4, a dragging and pushing device 5, a pier top supporting sliding device 6, a self-balancing horizontal inner support 7 and a vertical temporary support 8.
Example (b): as shown in fig. 1, the self-balancing thrust-free dragging and pushing system in this embodiment is used for dragging and pushing a moved structure 1, where the moved structure 1 may be a beam end of a bridge.
As shown in fig. 1, the self-balancing non-thrust dragging pushing system in this embodiment includes a plurality of vertical temporary supports 8 disposed below the moved structure 1, the plurality of vertical temporary supports 8 are uniformly arranged at intervals along the moving direction of the moved structure 1, and the distance between two adjacent vertical temporary supports 8 satisfies the requirement of effectively supporting the moved structure 1, so as to avoid instability of the moved structure 1 during movement due to an excessively large distance between the vertical temporary supports 8.
On top of each vertical temporary support 8, a pier top support sliding apparatus 6 is provided, the pier top support sliding apparatus 6 being used to support the structure 1 to be moved. The top surface of the pier top supporting sliding device 6 is in contact with the moved structure 1 as a contact surface.
As shown in fig. 1, a dragging pushing device 5 is further arranged at the top of a vertical temporary support 8 in front of the moved structure 1 in the moving direction, and the dragging pushing device 5 is used as a force application device for the moved structure 1 and is fixedly connected with the moved structure 1 through a horizontal cable 4; the pulling and pushing device 5 can be a horizontal jack. Specifically, as shown in fig. 1, a rear anchor 3 is fixedly arranged at the bottom of a moved structure 1, the rear anchor 3 can be an anchor plate, one end of a horizontal cable 4 is fixedly connected with the rear anchor 3, and the other end of the horizontal cable is fixedly connected with a dragging jacking device 5; when the dragging pushing device 5 works, the dragging pushing device applies pulling force to the rear anchor 3 through the horizontal cable 4, and then the rear anchor 3 is fixedly connected with the moved structure 1, so that the pulling force is transmitted to the moved structure 1 through the rear anchor 3, and the moved structure 1 moves on the pier top supporting sliding device 6.
As shown in fig. 1, the vertical temporary supports 8 are connected by providing a self-balancing horizontal internal support 7, and the self-balancing horizontal internal support 7 is provided at the top of the vertical temporary support 8 and is arranged at a position as close as possible to the dragging pushing device 5, and is used for transmitting horizontal force. Generally speaking, the self-balancing horizontal internal support 7 is arranged below the installation platform of the dragging pushing device 5, the installation platform of the dragging pushing device 5 is the operation platform at the top end of the vertical temporary support 8, and the pier top support sliding device 6 is also erected on the operation platform.
As shown in fig. 1, a guide device 2 is further arranged in front of the moved structure 1 in the moving direction, the bottom surface of the guide device 2 is arranged obliquely upwards and is not in contact with the pier top supporting sliding device 6, and the guide device 2 has the function of ensuring the direction accuracy and the force smoothness of the moved structure 1 in the moving process, and particularly avoiding the instability of the moved structure 1 when the front end of the moved structure 1 in the moving direction is positioned between two adjacent vertical temporary supports 8 in the moving process.
The self-balancing push system without thrust in the embodiment adopts an internal force self-balancing principle, so that the pulling force is changed into the internal force, the horizontal thrust is balanced by using the friction force at the position of the fulcrum, and the specific principle is as follows:
as shown in fig. 2, pulling thrusting device 5 applies pulling force "F pull" to moved structure 1 through rear anchor 3, the pulling force makes moved structure 1 move along arrow direction of F pull marked in fig. 2, at this time, friction force received by moved structure 1 itself is "F1", and during moving, it applies a friction force "F2" equal to moving direction thereof to vertical temporary support 8 through pier top support sliding device 6, at this time, because self-balancing horizontal inner support 7 is arranged between vertical temporary supports 8, horizontal pushing force "F push" generated during thrusting and thrusting device 5 transfers counter force formed as friction force F2 through self-balancing horizontal inner support 7, so that forward and backward horizontal force is simultaneously received on vertical temporary support 8, thereby self-balancing force is achieved, and there is no need for horizontal pushing resisting temporary device used by pulling thrusting device 5, the construction without thrust is realized through self-balancing force, so that the convenience of construction is greatly improved. In this embodiment, since the self-balancing horizontal inner support 7 is disposed adjacent to the vertical temporary support 8, the horizontal force transmission is effective and stable, and the self-balancing of the vertical temporary support 8 can be ensured.
In the construction of the embodiment, the construction method comprises the following construction modes:
1) vertical temporary supports 8 are erected.
2) And a self-leveling horizontal inner support 7 is erected.
3) And a horizontal cable 4, a dragging pushing device 5 and a pier top support sliding device 6 are arranged at the top of the vertical temporary support 8.
4) The guide 2 is attached to the front end of the structure 1 to be moved, and the rear anchor 3 is attached to the rear end.
5) The rear anchor 3 and the pulling and pushing device 5 are connected through a horizontal cable 4.
6) And starting the dragging and pushing device 5, and dragging the moved structure forward 1 through the horizontal cable 4.
7) The horizontal force of the vertical temporary support 8 is self-balanced from the horizontal transverse and horizontal inner support 7 by the embodiment.
8) And (5) circulating the operations of the step 6) and the step 7) until the pushing is in place.
In the embodiment, in specific implementation: vertical interim support 8 includes the stand and sets up the support between the stand, and it can adopt steel construction stand and steel structural support, is convenient for erect and subsequent dismantlement is retrieved.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (7)
1. A self-balancing thrust-free dragging and pushing system is used for dragging and pushing a moved structure and is characterized in that: including a plurality of vertical temporary supports, prop fixed connection through self-balancing level in between the vertical temporary support and constitute wholly the top of vertical temporary support is provided with mound top support sliding equipment, mound top support sliding equipment is used for supporting by the moving structure thing just the top surface of mound top support sliding equipment be with by the removal face of moving structure thing contact by one in moving structure thing moving direction the place ahead the top of vertical temporary support is provided with dilatory thrustor, dilatory thrustor pass through the horizontal cable with by moving structure thing fixed connection, dilatory thrustor passes through the horizontal cable is right it exerts the pulling force to be moved the structure thing.
2. The self-balancing push system without thrust dragging as claimed in claim 1, wherein: a guide device is provided at the leading end of the structure to be moved along the moving direction of the structure to be moved.
3. The self-balancing push system without thrust pull of claim 2, wherein: the bottom surface of the guide device is arranged obliquely upwards.
4. The self-balancing push system without thrust dragging as claimed in claim 1, wherein: and a rear anchor is arranged at the bottom of the moved structure and behind the moved structure along the moving direction of the moved structure, one end of the horizontal cable is fixedly connected with the rear anchor, and the other end of the horizontal cable is fixedly connected with the dragging and pushing equipment.
5. The self-balancing push system without thrust dragging as claimed in claim 1, wherein: the vertical temporary supports are arranged at regular intervals along the moving direction of the moved structure.
6. The self-balancing push system without thrust dragging as claimed in claim 1, wherein: the self-balancing horizontal inner support is arranged at the top of the vertical temporary support and is lower than the mounting platform of the dragging pushing equipment.
7. The self-balancing push system without thrust dragging as claimed in claim 1, wherein: the vertical temporary support comprises upright posts and supports arranged between the upright posts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178200.6A CN112813846A (en) | 2021-02-09 | 2021-02-09 | Self-balancing thrust-free dragging pushing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178200.6A CN112813846A (en) | 2021-02-09 | 2021-02-09 | Self-balancing thrust-free dragging pushing system |
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| Publication Number | Publication Date |
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| CN112813846A true CN112813846A (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110178200.6A Pending CN112813846A (en) | 2021-02-09 | 2021-02-09 | Self-balancing thrust-free dragging pushing system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1515689A (en) * | 1966-04-01 | 1968-03-01 | Strabag Bau Ag | Method of constructing multi-span bridges or similar constructions |
| CN102373671A (en) * | 2011-11-18 | 2012-03-14 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
| CN102587291A (en) * | 2012-03-27 | 2012-07-18 | 中交四航局第一工程有限公司 | Walking type multipoint pushing construction method and walking type multipoint pushing construction system for steel box girder |
| CN205443941U (en) * | 2015-10-14 | 2016-08-10 | 中建钢构有限公司 | Suspension bridge pushing device and top push away system |
| CN206256387U (en) * | 2016-12-02 | 2017-06-16 | 中铁六局集团有限公司 | A kind of steel box-girder incremental launching construction steel nose girder |
-
2021
- 2021-02-09 CN CN202110178200.6A patent/CN112813846A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1515689A (en) * | 1966-04-01 | 1968-03-01 | Strabag Bau Ag | Method of constructing multi-span bridges or similar constructions |
| CN102373671A (en) * | 2011-11-18 | 2012-03-14 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
| CN102587291A (en) * | 2012-03-27 | 2012-07-18 | 中交四航局第一工程有限公司 | Walking type multipoint pushing construction method and walking type multipoint pushing construction system for steel box girder |
| CN205443941U (en) * | 2015-10-14 | 2016-08-10 | 中建钢构有限公司 | Suspension bridge pushing device and top push away system |
| CN206256387U (en) * | 2016-12-02 | 2017-06-16 | 中铁六局集团有限公司 | A kind of steel box-girder incremental launching construction steel nose girder |
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